E4 error light comes on, dishwasher won't run, this apparently means water is on a sensor, have removed water from collection tray in bottom, tilted machine backward to dry out sensor, left for 24 hours, machine still won't run. Currently a very small new counter top but a useless dishwasher.

Answers :

The problem is related to the floater assembly inside the dishwasher. It is filling up with gunk and stop working properly. I found out the hard way after a good spill. The solution is easy but takes a bit of time.1. Unplug the power and water hoses.Unscrew the main cover ( both sides , pry off plastic caps first) back, and open door to remove the screws form the left and top attached to the main cover.2. Remove the cover completely by lifting and slightly bending the bottom to unlatch.3. On the right side, you can see the floater assembly. Remove the single screw on the lever and turn the lever 90 degrees to remove from the piston. Pry out the reservoir cover by pressing on the two latches(one is glued on, remove the glue).4. You will see a very dirty mechanism which have to be cleaned up totally with sponges and paper towels. If possible ,you can try to insert a flexible wire inside the rubber hose at the bottom to ensure nothing is blocking it.5. Replace the reservoir cover with its piston and re-install the lever.6. At this stage, before installing the big cover, you can connect the hoses and power cord and try with setting P5 to start a small run. You should see the lever rising during water filling, when the spinner start turning, water filling stops for a moment then starts again for a brief period. This is a good check of the health of the float assembly when you run your washer. There should be a brief period of stop and start of water fill like you had when your machine was brand new.7. Re-install the cover. ( the darker colored screws go in the front (behind door). Put back plastic caps . Reconnect power and water hoses.8. Repeat from time to time when you don't hear the start and stop water fill.

I got the same error and took all the water out of the heating element collecting tray, cleaned all food particles and mildew (yuck) from the sensor and all the cavities in the tray. The machine is back up and running.

When the E4 error came on, the machine got overfilled and spilled water all over the counter. Had to bail all the water out manually and then clean.

These machines definitely require some hands on maintenance and repair once in a while. It's my second one and having to reseal the look through window with aquarium glue after a few months is a routine.

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